Worcester Greenstar FS 42CDi Regular User Manual

COMMISSIONING
INSTALLATION & SERVICING INSTRUCTIONS
31
8 716 115 216b (09.2008)
WATER TREATMENT
IMPORTANT: Debris from the system can
damage the boiler and reduce efficiency.
Failure to comply with the guidelines for
the use of water treatment with the
appliance will invalidate the appliance
warranty.
FLUSHING (Central Heating):
Switch off the boiler.
Open vented systems only: turn off the
water to the system header tank.
Open all radiator valves/drain cocks and
drain the system while the appliance is
hot.
Close drain cocks.
Add a suitable flushing agent and refill
the system at the correct strength for the
system condition in accordance with the
manufacturer's instructions.
Run the boiler/system at normal operating
temperature for the time stated by the
flushing agent manufacturer.
Drain and thoroughly flush the system to
remove the flushing agent and debris.
INHIBITOR (Central Heating):
Check drain cocks are closed and all
radiator valves are open.
Add a suitable* inhibitor, (or combined
inhibitor/anti-freeze if the system is
exposed to freezing conditions) to the
heating system in accordance with the
manufacturers instructions.
The inhibitor or combined inhibitor/anti-
freeze must not cause damage to the
materials within the boiler (aluminium,
stainless steel, copper and brass) and any
other materials/components within the
system.
Open vented systems only: turn on the
water to the system header tank and allow
the system to fill.
Sealed systems only: fill the system to
between 1 and 2 bar via a WRAS approved
filling loop.
Vent the boiler and all radiators; retighten
vents when complete.
Record the date when the inhibitor was
added to the system on the guarantee card.
NOTE:
The concentration level of inhibitor in the system
should be checked every 12 months or sooner
if system content is lost.
The addition of sealing agents to the system
water is not recommended as this can cause
problems with deposits left in the heat
exchanger.
* compatible with aluminium. The pH
value of the system water must be less
than 8 or the appliance guarantee will
be invalidated.
WATER TREATMENT

Worcester Greenstar FS 42CDi Regular Specifications

General

Model	Greenstar FS 42CDi Regular
Category	Boiler
Output Rating	42 kW
Fuel Type	Natural Gas
Efficiency Rating	A
Max Operating Pressure	3 bar
Type	Regular
Warranty	5 years